1. Achondroplasia is apparent at birth and has a birth prevalence of 1 in 20 000–30 000 live-born infants

2. ‘Almost 50% of spontaneous abortions are Aneuploid or polyploid and the incidence of numerical aberrations in live-born young is ~ 5/1000 births.’ ‘The percentages of Aneuploid bone marrow leukocytes were higher than those of Aneuploid sperm for the two upper THH dose groups and for the positive control group.’